Non-contact governor main distributing valve core displacement measuring method and device

Abstract

The invention provides a non-contact governor main distributing valve core displacement measuring method and device. The device comprises a main distributing valve sleeve, a main distributing valve core, a main distributing displacement measuring circular table, a main distributing displacement measuring bracket and a main distributing displacement measuring probe. The main distributing displacement measuring probe is arranged on the end cover of the main distributing valve sleeve. The main distributing displacement measuring circular table is arranged on a connecting rod, which is outside themain distributing valve sleeve, of the main distributing valve core. A through core hole which matches the connecting rod in diameter is arranged in the axial center of the main distributing displacement measuring circular table, wherein the connecting rod of the main distributing valve core is outside the main distributing valve sleeve. The main distributing displacement measuring circular tableis vertically fixed and limited. The main distributing displacement measuring bracket is fixed on the end cover of the main distributing valve sleeve. The main distributing displacement measuring probe is fixed on the main distributing displacement measuring bracket. According to the invention, the axial displacement of the main distributing valve core is converted to radial displacement change through the main distributing displacement measuring circular table; the change of the distance from the head end face of the main distributing displacement measuring probe to the main distributing displacement measuring circular table is measured; and the displacement of the main distributing valve core is measured.

Description

technical field [0001] The invention discloses a method and device for measuring the displacement of a main valve core of a non-contact governor, and relates to the technical field of hydroelectric generating set operation. Background technique [0002] The measurement of the displacement of the main distribution spool is an important part of the stable operation of the hydro-generator set. Whether the displacement of the main distribution spool can be accurately measured directly affects whether the guide vanes of the unit can be controlled normally and accurately. At present, hydropower stations generally use contact sensors, such as rod-type displacement sensors, to measure the displacement of the main spool. The above-mentioned measurement methods and devices have the following defects: [0003] (1) With the contact measurement method, the crank arm of the measurement bracket will inevitably be deformed due to stress, which will affect the measurement accuracy. [0004]...

AI Technical Summary

Problems solved by technology

[0003] (1) With the contact measurement method, the measuring bracket arm will inevitably be deformed due to stress, which will affect the measurement accuracy

[0004] (2) The displacement of the main spool is generally small, while the rod type displacement sensor generally has a large measurement range and the range does not match

[0005] (3) The measuring device is generally large in size, difficult to install, and inconvenient to disassemble, adjust and maintain

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